Improvement in method of constructing moulds for metallic castings



l :the flask is to' rise' and'fall;

fall Without tllrningon its vertical axis.-

WILLIAM l-IAINSWORTH, OF SHARPSVILLE, PENNSYLVANIA.

l Lette/rs Patent No. 87,663, (lated Mol/rch 9, 1869.

IMPROVEMENT IN METHOD OF COVNSTRCTING- MOULDS FOR. METALLIC CASTINGS.

The Schedule referred to in these Letters Patent and making part of the same.

To all 'whom @t ma/y concern:

Be it known that l, WILLIAM HArNswonTH, of Sharpsville, in the ycounty of Mercer, and State of Pennsylvania, have invented a new and improved Machine for Making Moulds and Cores for Castings; and I do hereby declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in Which-f- Figure 1 is a front elevation, and

Figure 2, a side elevation. l

This invention consists in'fastening the pattern in the flask, iu proper position, and then, as the sand, is tilled in, raising both pattern and flash together to a considerable height, and dropping them upon a solid bed, so that thel concussion produced by the fall may ack the sand closely and evenly in the flask in and around the pattern.

In the drawings- A is a solid bed, at the bottom of' the pit in which The essential feature of this invention consists in fastening the pattern and flask together by means of stays, straps, or hooks, and then, while the sand is filling into the flask, raising the two up by means of the upper end of the pattern, and letting them fall together upon the bed A, soY as to firmly compact the sand.

To raise and drop the plunger D, I" employ a tripping-wheel, T, provided with a tooth, t, whichtooth strikes against a projection, c, on the plunger, and raises ther'latter with the flask until the projection c slipjsvoli1 from the tooth t, when thepattern and flask will fall together upon the bed A.

The same shaft M that carries the wheel T, also carries a spur-wheel, N, .alongside of the wheel T, which wheel N may be made to engage with a rack, n, upon the plunger', and raise the latter out of the flask when required, thestraps binding the two together having been first undone. f

A fast pulley,`lf, and a loose one, L, maybe attached to the shaft M, for the lpurpose of operating it conveniently.

Cores forlnoulds may be made in a similar manner, by raising core-box, core-bar, and sand together, and letting them all drop upon a hard bed.

lHaving thus described myjinvention,

What l claim as new, and desire to secure by Letters Patent, is

The packing of sand, for a mould, in a ilask,'b`y r'aisingthe same, together with the pattern, and letting them' all drop upon a-hard bed, substantially as shown anddescribed. l

B B is the frame-work, which supports the openatin gmechanism; t

C is the flask; and t D, the pattern, the latter capable of rrn attachment to the former in proper position for forming the mould, and alsoof being easily detached. The pattern is made hollow, and is in two semi-cylindrical pieces, properly connected together, forming, when shut, a tube, smooth both inside and outside. l I Y The flask is larger at the bottom than at-the top, and is provided with a trap-door at its lower end, which allows the sand to drop out when desired;

The pattern, D, extends up through guides B B', that hold it in a vertical position, and allow it 'to rise and WILLIAM nAlNswoRTH.

Witnesses J. J. Pinnen Gno. D. KELLY. 

